invites and endorsement

Hi o/

Since the server knows who made which invite link (if people are making one to send to a friend), having that included when someone joins, would be some neat feature. That will automatically endorse that person that expanded the server by inviting a friend to it.

Could be a small note below the welcome message (if set to on) - I would love to see who got someone to join the server (unless they're just using the already made link that never expires). I have got 70+ ppl in my server and my link has only bee used 26 times, and I was pretty quickly to make that from, the getgo. That means a lot of the people got in by getting an invite, that ran out and thus no longer shows on the list.